ARP SB Chevy Head Stud Kit - 12-Point Head, Undercut Studs, SB Chevy w/ BRODIX 18 Heads 100021 billet aluminum arms have a

billet aluminum arms have a high resistance to twisting

Adjustment bolt has detents to lock at each half turn

User selectable standard or metric display (100-300F/40-150C)

These are not Concours reproductions

ARP SB Chevy Head Stud Kit - 12-Point Head, Undercut Studs, SB Chevy w/ BRODIX 18 Heads 100021 billet aluminum arms have aPrecision centerless ground and thread rolled to Mil S 8879 specs. Black oxide finish protects from wear and corrosion. Includes hardened parallel washers for uniform load distribution and accurate torque readings. Since 1968, ARP is the fastener of champions and the world leader in fastener technology. Product Description: Cylinder Head Stud Kit 12 Point Nuts Chromoly Black Oxide Undercut Aftermarket Head Small Block Chevy